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【单选题】
Following excercise 2, if the consumer does not know the effort of the manufacturer, nor does the manufacturer know the effort of consumer. If further more, the manufacturer can charge a price to extract all consumer's surplus, what is the equilibrium effort of the consumer?A.
e1=e2=0.25
B.
e1=e2=0.5
C.
e1=0.75,e2=0.25
D.
e1=0.25,e2=0.75
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